This document provides instructions for configuring a transformer to operate at either 120VAC or 240VAC. It warns to disconnect power before working and notes that the wiring diagram inside the front panel must be referenced to determine the appropriate transformer connection. Connecting the white with black stripe and solid white wires configures it for 240VAC operation, while connecting the solid black and white with black stripe wires and solid white and white with red stripe wires configures it for 120VAC operation.